I have the sampler disc. So far, I have watched only Sins of the Father. It looked and sounded fantastic. Colors and effects seemed true to the original. Grain is present, and the detail level was high. I noticed a tiny amount of upscaled material for a couple of shots that obviously could not be recovered.
I know these episodes very well and was looking for flaws, but any imperfections were minor. Shots of Qo'nos look better than they ever have. I'm not a great audiophile, but dialogue seemed crisp, and I heard background noises clearly, such as dripping water and footsteps on carpets. If the whole series is like this, I shall be very happy. If Star Wars were restored like this, I think most of use would be ecstatic.